Development of Oxide and Molecularly-defined Heterogeneous Catalysts for Anodic Water Oxidation PDF Download
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Author: Dmitry Lebedev
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Dmitry Lebedev
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author:
Publisher:
ISBN: 9789174476262
Category :
Languages : en
Pages : 80
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Book Description
Author: Carminna Ottone
Publisher: Springer
ISBN: 3030127125
Category : Technology & Engineering
Languages : en
Pages : 117
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Book Description
This book offers comprehensive information on the main techniques for measuring water-oxidation-catalyst (WOC) performance, with a particular focus on the combined use of sacrificial oxidants and dyes within closed-batch reactors. It provides an overview of the latest advances in the synthesis of more efficient WOCs, followed by an analysis of the requirements for sustainable energy production. Readers will find a detailed description of the reaction mechanism used in catalyst assessment systems, which reveals the benefits and limitations of the most common sacrificial oxidant/dye pair. Experimental techniques including electrochemical methods for characterizing novel and non-photoactive WOCs are also described. Throughout the book, various manganese oxides are used as examples of the techniques reviewed or proposed systems. Cost considerations and technological perspectives of the scale-up of solar-driven hydrogen production are also addressed. Lastly, the book presents lessons learned from the implementation of a large-scale real-world device.
Author: Noritaka Mizuno
Publisher: John Wiley & Sons
ISBN: 3527627553
Category : Science
Languages : en
Pages : 356
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Book Description
Filling a gap in the current literature, this comprehensive reference presents all important catalyst classes, including metal oxides, polyoxometalates, and zeolites. Readers will find here everything they need to know -- from structure design to characterization, and from immobilization to industrial processes. A true must-have for anyone working in this key technology.
Author: Gabriele Centi
Publisher: Springer Science & Business Media
ISBN: 1461541751
Category : Science
Languages : en
Pages : 519
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Book Description
Selective Oxidation by Heterogeneous Catalysis covers one of the major areas of industrial petrochemical production, outlining open questions and new opportunities. It gives keys for the interpretation and analysis of data and design of new catalysts and reactions, and provides guidelines for future research. A distinctive feature of this book is the use of concept by example. Rather than reporting an overview of the literature results, the authors have selected some representative examples, the in-depth analysis of which makes it possible to clarify the fundamental, but new concepts necessary for a better understanding of the new opportunities in this field and the design of new catalysts or catalytic reactions. Attention is given not only to the catalyst itself, but also to the use of the catalyst inside the process, thus evidencing the relationship between catalyst design and engineering aspects of the process. This book provides suggestions for new innovative directions of research and indications on how to reconsider the field of selective oxidation from different perspectives, outlining that is not a mature field of research, but that new important breakthroughs can be derived from fundamental and applied research. Suggestions are offered on how to use less conventional approaches in terms of both catalyst design and analysis of the data.
Author: Antoni Llobet
Publisher: John Wiley & Sons
ISBN: 1118698622
Category : Technology & Engineering
Languages : en
Pages : 343
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Book Description
Photocatalytic water splitting is a promising strategy for capturing energy from the sun by coupling light harvesting and the oxidation of water, in order to create clean hydrogen fuel. Thus a deep knowledge of the water oxidation catalysis field is essential to be able to come up with useful energy conversion devices based on sunlight and water splitting. Molecular Water Oxidation Catalysis: A Key Topic for New Sustainable Energy Conversion Schemes presents a comprehensive and state-of-the-art overview of water oxidation catalysis in homogeneous phase, describing in detail the most important catalysts discovered today based on first and second row transition metals. A strong emphasis is placed on the description of their performance, as well as how they work from a mechanistic perspective. In addition, a theoretical description of some of the most relevant catalysts based on DFT are presented, as well as a description of related natural systems, such as the oxygen evolving system of photosystem II and the heme chlorite-dismutase. This book is a valuable resource for researchers working on water oxidation catalysis, solar energy conversion and artificial photosynthesis, as well as for chemists and materials scientists with a broad interest in new sustainable energy conversion schemes.
Author: Mario G. Clerici
Publisher: John Wiley & Sons
ISBN: 1118356756
Category : Science
Languages : en
Pages : 438
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Book Description
Sets the stage for environmentally friendly industrial organic syntheses From basic principles to new and emerging industrial applications, this book offers comprehensive coverage of heterogeneous liquid-phase selective oxidation catalysis. It fully examines the synthesis, characterization, and application of catalytic materials for environmentally friendly organic syntheses. Readers will find coverage of all the important classes of catalysts, with an emphasis on their stability and reusability. Liquid Phase Oxidation via Heterogeneous Catalysis features contributions from an international team of leading chemists representing both industry and academia. The book begins with a chapter on environmentally benign oxidants and then covers: Selective oxidations catalyzed by TS-1 and other metal-substituted zeolites Selective catalytic oxidation over ordered nanoporous metallo-aluminophosphates Selective oxidations catalyzed by mesoporous metal-silicates Liquid phase oxidation of organic compounds by supported metal-based catalysts Selective liquid phase oxidations in the presence of supported polyoxometalates Selective oxidations catalyzed by supported metal complexes Liquid phase oxidation of organic compounds by metal-organic frameworks Heterogeneous photocatalysis for selective oxidations with molecular oxygen All the chapters dedicated to specific types of catalysts follow a similar organization and structure, making it easy to compare the advantages and disadvantages of different catalysts. The final chapter examines the latest industrial applications, such as the production of catechol and hydroquinone, cyclohexanone oxime, and propylene oxide. With its unique focus on liquid phase heterogeneous oxidation catalysis, this book enables researchers in organic synthesis and oxidation catalysis to explore and develop promising new catalytic materials and synthetic routes for a broad range of industrial applications.
Author: Jared Mondschein
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Recent developments in photovoltaic technologies have enabled the cost-effective and energy efficient generation of power from sunlight. However, a key limitation preventing the widespread adoption of solar power is the inherent intermittent nature of sunlight and the current lack of a viable energy storage solution. A promising biomimetic approach is the storage of sunlight in chemical bonds, similar to the photosynthetic process employed by autotrophs. This scheme relies on the photoelectrolysis of water into oxygen gas at the anode via the oxygen evolution reaction (OER) and hydrogen gas at the cathode via the hydrogen evolution reaction (HER). The produced H2(g) is a gravimetrically dense energy carrier that could be consumed in fuel-cell powered technologies or used as a raw material in a wide variety of industrial processes ranging from ammonia production to food processing. Electrocatalysts for the HER and OER are needed to overcome poor reaction kinetics at their respective electrodes. To achieve economies of scale and to enable industrial applications, OER and HER catalysts should be capable of producing large current densities with minimal overpotentials for prolonged time periods and should be composed solely of Earth-abundant elements. The hydrogen evolution reaction can be catalyzed in strongly acidic, pH neutral, and strongly alkaline electrolytes, and several highly active corrosion-resistant electrocatalysts composed of Earth-abundant elements have been discovered in recent years. The oxygen evolution reaction can also be catalyzed in a wide pH range, but few highly active and stable Earth-abundant electrocatalysts for the OER have been discovered for operation in strongly acidic electrolytes. Indeed, the advantages of operating photoelectrochemical water splitting cells with strongly acidic electrolytes, including improved device component compatibilities, higher achievable current densities and longer periods of operation, motivates the discovery of novel acid-stable water oxidation catalysts.We first discovered that cobalt oxide thin films supported on fluorinated tin oxide were promising water oxidation catalysts in strongly acidic electrolytes, producing industrially relevant current densities at moderate overpotentials. The low dissolution rate of the Co3O4/FTO catalyst was a significant advance over previously reported Earth-abundant OER catalysts. Importantly, we found that the electrode preparation method employed in this study was critical to the observed activity and stability. We then found that intermetallics of 3d transition metals with tantalum, specifically Ni2Ta, Fe2Ta, and Co2Ta, could serve as pre-catalysts for active and stable water oxidation catalysts for use in strongly acidic electrolytes. These water-splitting anodes were synthesized as stand-alone electrodes via arc melting and polycrystalline solid-state reactions. These intermetallics displayed improved corrosion and water splitting properties over their monometallic end members.Expanding on this work, we developed a water-oxidizing anode based on the crystalline oxide Li3Co2TaO6 with demonstrated capability for prolonged operation in strongly acidic electrolytes. The durability of this catalyst could be improved by adjusting the chemical composition of the conductive support, with a platinum-supported catalyst operating for ~2x the operation time of a gold-supported catalyst. Developing synthetic routes toward high surface area Li3Co2TaO6 anodes shows promise for decreasing the overpotentials required to produce industrially relevant current densities. The transportation of photoelectrochemically-produced hydrogen gas is resource-intensive, and the development of dense solids capable of the storage and on-demand release of hydrogen is therefore of high scientific interest. Ammonia borane is a promising hydrogen storage material, capable of releasing three molar equivalents of hydrogen via catalytic hydrolysis. Unfortunately, the most active catalysts for the hydrolysis of ammonia borane are composed of noble metals, motivating the discovery of highly active, recyclable catalysts with diluted noble metal content. To this end, we discovered a class of metal ruthenate perovskites that are active catalysts for the hydrolysis of ammonia borane, a promising hydrogen storage material. These metal ruthenates exhibited turnover frequencies that are comparable to emerging Earth-abundant ammonia borane hydrolysis catalysts. Importantly, these materials expand the scope of active oxide-based catalysts, potentially motivating the synthesis of complex metal oxides as discovery targets.
Author: Satoshi Kawata
Publisher: Springer Science & Business Media
ISBN: 3540415025
Category : Medical
Languages : en
Pages : 216
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Book Description
This up-to-date overview describes in detail the physics of localized surface plasmon polaritons excited near fine metallic structures and the principles of near-field optics and microscopy related to this localized field. It also covers wider fields, from local spectroscopy to atom manipulation.
Author: Makoto Misono
Publisher: Elsevier Inc. Chapters
ISBN: 0128081090
Category : Science
Languages : en
Pages : 87
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Book Description
The chemistry of metal oxides, both single and mixed metal oxides, relevant to heterogeneous catalysis such as relationships among the composition, structure, and chemical properties of mixed oxides, is provided in perspective. The important chemical properties in heterogeneous catalysis are acid–base and reduction–oxidation (redox) properties, where ionic radii, electronegativity, valency, and tendency to form covalent bond of constituent elements are most influential. Structural factors such as lattice defects and nonstoichiometry are also relevant. Although the surface of metal oxides is different from the solid bulk and changes depending on various factors, the surface reflects more or less the solid bulk and the knowledge of bulk properties is useful to understand the catalysis of mixed oxides. In some cases, the solid bulk actually takes part in catalysis. Other fundamental features of metal oxide catalysis like synergistic effects of more than two different active sites (acid and base, acid and oxidation, etc.) are also discussed.
